AIDS symptoms include fever, headache, rash, and sore throat, as well as swollen lymph nodes, rapid weight loss, recurring fever, diarrhea, night sweats, and mouth sores resulting from a weakened immune system.

Symptoms commonly seen in AIDS patients generally include:

Rapid weight loss
Night sweats
Fever
Diarrhea
Extreme fatigue and weakness
Swollen lymph nodes
White spots in the mouth and sores on genitals
Skin rashes and scaling
Sore throat
Pneumonia due to lung inflammation
Red, brown, pink, or purplish spots on the skin
Onset of psychological problems like depression
Neurological problems like memory loss

AIDS symptoms can be explained as follows:

Rapid weight loss
As the HIV virus enters the body, the body's immune system, which is now vulnerable to infections, weakens. The resulting infections, hormonal and metabolic changes, or side effects of HIV medications can cause weight loss.

Night sweats
Both fever and night sweats can occur as symptoms in people with HIV. Both are indicative of the body fighting the virus. When the body begins fighting an infection, body temperature rises, leading to sweating.

Recurring fever
When the HIV virus enters the body, the immune system responds by producing antibodies to defend itself. This stage of acute HIV infection is called "seroconversion." Body temperature rises and recurring high fever occurs as the body attempts to kill harmful pathogens.

Swollen lymph nodes
Swollen lymph nodes in AIDS, resulting from the HIV virus, occur as the infection reaches the nodes via lymphatic fluid. HIV is most commonly seen in lymph nodes around the neck, as well as in the armpits and groin.

Sores in the mouth and on genitals
Due to a weakened immune system in AIDS, the body struggles to fight off infections, resulting in sores in the mouth.

Purple or pinkish spots on the body
AIDS, occurring alongside HIV, can create a basis for the formation of purple or pinkish sores on the body due to the virus's effect on the immune system.

Chronic diarrhea
AIDS affecting the digestive system and intestines causes diarrhea.

Memory loss
HIV can damage and disable nerve cells in the brain. HIV can cause general inflammation which can lead to memory loss as well as other aging processes, including heart disease.

Muscle aches
HIV infection causes inflammation in the soft tissues and joints around the joints, as well as joint and muscle pain. The virus can also enter the fluid within the joints, triggering painful reactions.